Calculate the following. i) The slope (m) and the standard deviation of the slope. ii) The concentration of Na ( CA)  in the unknown.

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Calculate the following.

i) The slope (m) and the standard deviation of the slope.

ii) The concentration of Na ( CA)  in the

unknown.

 

Lithium is often added as an internal
standard in the determination of sodium
by flame emission spectroscopy. The
following emission intensity data were
obtained for solutions containing Na and
1000 ppm Li.
Cu ppm
Na intensity. Li intensity,
(he)
(4)
1.0
10.0
10.0
1.00
2.0
15.3
7.5
2.04
5.0
34.7
6.8
5.10
7.5
65.2
8.5
7.67
10.0
95.8
10.0
9.58
20.0
110.2
5.8
19.0
Unknown 1
47.3
7.6
6.20
Unknown 2
48.6
7.9
6.12
Unknown 3
47.3
7.5
6.32
Transcribed Image Text:Lithium is often added as an internal standard in the determination of sodium by flame emission spectroscopy. The following emission intensity data were obtained for solutions containing Na and 1000 ppm Li. Cu ppm Na intensity. Li intensity, (he) (4) 1.0 10.0 10.0 1.00 2.0 15.3 7.5 2.04 5.0 34.7 6.8 5.10 7.5 65.2 8.5 7.67 10.0 95.8 10.0 9.58 20.0 110.2 5.8 19.0 Unknown 1 47.3 7.6 6.20 Unknown 2 48.6 7.9 6.12 Unknown 3 47.3 7.5 6.32
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